fr om the #1 bestselling autho r of The Fault in Our Stars Winner of the Edgar Award fo r Best Young Adult Mystery New Yo r k Times bestseller USA Today bestseller Publishers Weekly bestseller When Margo Roth Spiegelman beckons Quentin Jacobsen in the middle of the night—dressed like a ninja a nd plotting an ingenious campaign of revenge—he follows her. Margo’s always planned extravagantly, a nd, until now, she’s always planned solo. After a lifetime of loving Margo fr om afar, things are finally looking up fo r Q . . . until day breaks a nd she has vanished. Always an enigma, Margo has now become a mystery. But there are clues. a nd they’re fo r Q. Printz Medalist John Green returns with the trademark brilliant wit a nd heart-stopping emotional honesty that have inspired a new generation of readers.